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이덕재(Deok-Jae Lee),김태윤(Tai-Yun Kim) 한국정보과학회 1995 한국정보과학회 학술발표논문집 Vol.22 No.1
ATM 네트워크에서 사용하는 트래픽 제어(traffic control)에는 UPC(Usage Parameter Control)과 CAC(Connection Admission Control)가 있다. 네트워크 상에서 트래픽들의 통신이 행해지는 동안 네트워크는 실제 트래픽의 특성이 미리 규정된 특성과 일치하는지를 감시한다. UPC에 셀의 입력시 버퍼에 포화가 발생하면 셀의 손실이 발생한다. 높은 우선 순위 셀의 손실은 통신 서비스의 질(QoS)에 상당한 영향을 미친다. 본 논문에서는 CLP(Cell Loss Priority)를 고려한 UPC의 셀 입력 기법을 제안한다. 임계값을 사용하는 PBS(Partial Buffer Sharing)에 제한값을 도입함으로써 높은 순위의 셀들에 대한 셀 손실률을 줄이 수 있다.
화학물질 누출에 따른 긴급 확산 방재시스템 개선 방안 연구
이덕재(Deok-Jae Lee),윤정현(Yun-Jeong Hyeon),유병태(Byung-Tae Yoo) 한국가스학회 2018 한국가스학회지 Vol.22 No.5
화학물질을 취급하는 중·소업체의 경우 누출 사고 시 자동화 시스템이 갖춰진 안전장치에 의한 방재체계가 아닌 근로자에 의한 긴급 방재가 주로 이루어져 인명․환경피해 등의 발생 가능성이 높다. 본 연구는 이러한 한계점을 개선하기 위해 화학물질 취급공정 중 누출 사고 발생 빈도에 따라 누출 예상지점에 선별적으로 쉽게 탈·부착이 가능한 긴급 확산방재시스템에 대해 연구하였다. 이를 통해 사고대응이 상대적으로 취약한 중소기업의 화학사고를 시스템적으로 예방하여 화학물질 누출사고에 의한 인명, 환경피해를 방지할 수 있다. In the case of medium and small-sized businesses handling hazardous chemicals, emergency disaster prevention by workers, rather than a disaster prevention system using a safety device equipped with an automation system in case of a leak accident, is highly likely to occur. In order to solve these limitations, in this study investigated an emergency disaster prevention system that can be easily removed and adhered to the expected point of leakage according to the occurrence frequency of the leak during the chemical handling process.
화학사고의 일차 대응을 위한 피해영향범위 산정 개선 방안
이덕재 ( Deok Jae Lee ),안재현 ( Jae-hyun Ahn ),송창근 ( Chang Geun Song ) 한국안전학회 2017 한국안전학회지 Vol.32 No.2
Calculation of the damage impact of chemical accidents is an important element in site, and the initial isolation distance and the protective action distances are significant factors in coping the chemical accident. In this study, three major cities that represent each Province were selected, and the safety distances were calculated considering regional climate conditions. The results were compared with the prescribed values in Emergency Response Guidebook. It is concluded that the regional meteorological conditions such as temperature, vapour pressure, relative humidity, wind speed, and cloud cover should be reflected in estimating the initial isolation distance and the protective action distance.
이덕재(Lee Deok-jae) 한국역사연구회 2009 역사와 현실 Vol.- No.74
By analysing economic policies conducted in the era of president Park's regime in Korea, the present study aims to explain the inherent contradictory structure that was revealed through the dynamics of antagonism between industrialization and democratization. In particular, the question is addressed in terms of dynamics of capital accumulation that why Park's regime was led to the so called Yusin regime governed by marital laws and the policy of heavy chemical industrialization in the 1970s. The main findings are as follows. Export-centered outward economic policies adopted by Park in order to bypass the aid dependent economy during the 1960s were turned out to be successful with unexpectedly high accomplishment. The strategy, however, was to establish an economic system that relied overwhelmingly on light industry and the rapid increase of imported capital, the limitations of which manifested themselves in the form of accumulation crisis at around the end of 1960s. The economic crisis at that time was accompanied by high political pressure of democratization. As Park made an attempt to break through the front side in 1971 by declaring a state of national emergency, the so called Yusin regime emerged. On economic side, a new development strategy of the heavy chemical industrialization was adopted. This rapid industrialization attempts gave the people an impression that the successful economic accomplishment might have required the delay of political democratization. In the same logic, it was the exhaustion of the energy of accumulation exhausted in the end of 1970s that brought Park's Yusin regime down to the end. The present study identifies two legacies inherited from Park's economic policy in terms of social justice that is the first value of social institution. First, the way under Park’s regime to mobilize social resources, especially during economic crisis, gave rise to the economic ideology that puts the top priority to economic growth, creating a psychological inertia that social justice could be sacrificed for economic growth. Second, the power of capitalists strengthened during economic crisis produced consolidated 'Chaebol system (plutocracy)', while democratic social institutions which are supposed to check monolithic power and restore the balance between labor and capital, have been weakened. These legacies prevent an balanced socio-economic system being installed into Korean society after democratization.